Roofing compound.



UNITED STATES nr rricE.

KARL WESSEL, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, T O I-IERMANN RENDTORFF, OF SAME PLACE.

ROOFING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 652,065, dated June 19,1900. Application filed March 21, 1899. Serial N0.'709,880. (N0specimens.)

To all whom it may concern:

Be it known that I, KARL WESSEL, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Roofing Compounds; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to a novel composition of matter adapted forroofing purposes, the object being to provide a composition which willbe impervious to moisture and will not be afiected by the sun; and itconsists of the ingredients hereinafter described and claimed.

My composition consists of a mixture comprising approximately two parts,by Weight, of coal-tar and one part of dried and pulverized slaked lime.The mixture is made by melting the tar to liquid condition and thengradually adding the slaked lime and thoroughly mixing it with the tar.The slaked lime is held in suspension in the tar, and the mixture thusformed is applied to the roof while.

hot and in liquid condition. After cooling the mixture takes the form ofa thick viscous mass of a dark grayish-brown color, which will notbecome hard and brittle, but remains sufficiently elastic to preventcracking. It also has the advantage that it will not become thin orliquid under the influence of the sun and will remain impervious tomoisture. A roof coated therewith will remain Waterproof for a farlonger time than if coated with pure coal-tar and gravel in accordancewith present methods.

I claim as my invention- A roofing compound consisting of coal-tar anddried and pulverized slaked lime mixed in proportion of about two partscoal-tar to one part slaked lime, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

KARL VESSEL.

Witnesses:

RUDOLPH WM. LOTZ, JOHN D. WILLIAMSON.

